The 2018 California State Rail Plan has a vision for 2040. Here is an excerpt:

"The 2040 Vision for passenger rail introduces new services and expands the State's rail network into new areas of California and across State borders, including the congested international border into Mexico.

The passenger component of the California rail vision includes several key elements:

Statewide System - Passenger rail service will tie together urban, suburban, and rural areas of the state.

Integrated Services - Multimodal hubs will connect all levels of service with a common fare system, which allows trips to be made on a single ticket.

Coordinated Schedules - Services will be coordinated in a 'Pulsed' schedule across the network to reduce wait times and allow direct transfers.

Frequent Service - Service frequency will make rail a timely option for travelers, meeting trip demands throughout the day.

Customer Focus - Enhanced ticketing, scheduling, and passenger information will be supported by coordinated services."

Another quote:

"Travel seamlessly across urban, suburban, and rural areas of the state with more trains, more often: Departures at least every hour - and every 30 minutes or better in most markets. (Some low-density areas of the state may have bi-hourly or every-4-hour service until the market matures.)"

By 2040 they want to increase the rail share from 0.34% today to 6.8% or 1,313,000 daily trips at all levels of passenger rail. Note that all emphasis is in the original.

If it works it will be like The Netherlands, one Clipper card like pass for everything. One can always hope. The young are better at that than us old farts.